Fig. 6

Fluorescence imaging of ATRA-loaded NP formulations in mice. a Time-dependent intensity images of fluorescence distribution in mice (arrows indicate accumulation of HA-eNPs in tumor-bearing lungs). b Fluorescence images of major organs at 8 h post-injection of NP formulations in mice. c Fluorescence microscopy images of tumor-bearing lung tissue section. Scale bar represents 50 μm